Engine



E. R. JACOBY' 2,124,702

ENGINE July 26, 1938.

Filed April 17, 1957.

INVENTOR.

5005 P Ja s c. ATTOQZEY.

Patented July 26, 1938 UNITED STATES PATENT OFFICE ENGINE Enos R. Jacoby, Muskegon, Mich., assignor to Continental Motors Corporation, Detroit, Mich a corporation of Virginia Application April 17, 1937, Serial No. 137,504

8 Claims. (01. 123188) This invention relates to engines and more in a conventional manner by the intake and exparticularly to valve construction for internal haust valves I 4 and [5 respectively. combustion engines and to an improved means It is particularly important to prevent any for shielding the exposed portion of the valve leakage of oil into the intake passage I6 from stem in order to decrease the tendency of oil around the valve stem. This intake valve l4 5 accumulations on said valve stem. includes a stem [1 which is suitably guidedin It is an object of the present invention to the valve guide I8, the upper end of said valve shield and/or protect the valve stem of an instem projecting from this valve guide and carryternal combustion engine and more particularly ing a valve spring retainer l9 against which the 19 a valve of the type and construction embodied valve spring 20 acts to yieldingly urge the valve in an overhead valve engine by providing a shield toward its seat. This valve spring retainer is for that portion of said valve stem which projects locked to the valve stem by means of the split from the valve guide. lock member 2| which is provided with inwardly A further object of my present invention is extending grooves 22 arranged to lock in the to provide an ei'ficient and economically congrooves 23 carried on the valve stem in the constructed shield for a valve stem by providing a ventional manner. shield which is securely carried in such a man- In order to shield the valve stem portion which ner as to shield the exposed portion of the valve projects above the valve stem guide for the purstem at all times during engine operation. pose of preventing oil from being splashed on A still further object of the invention is to the valve stem or otherwise accumulated there- 20 provide a novel and improved construction on, there is provided a shield member 24 which whereby a valve stem shield is embodied in the is preferably constructed of a tubular section assembly without affecting the operation of varicomprising a skirt portion 25 and a flange porous component elements necessary to obtain valve tion 26. This flange 26 is adapted to seat against 25 actuation and which may be very readily asthe underside of the flange 27 of said valve spring 25 sembled and which is of such a construction as retainer l9 and to depend therefrom in such a to permit ready and economical servicing of the manner as to shield the exposed portion of said parts aforesaid. valve stem. It will be noted that the skirt 25 For a more detailed understanding of the inis of such a length as to overlap the valve guide 30 'vention reference may be had to the accompanyeven when the valve is in closed position and 30 ing drawing illustrating a preferred embodiment is arranged to telescope over the valve guide of the invention in which: when the valve opens. A mid portion of said 1 is a fragmentary Sectional V ew through shield 24 is inwardly grooved as at 23 in order an engine illustrating Valve Construction, to support the gasket or washer 29 which seals Fig. 2 s a distended perspective w of a around the valve stem immediately below the 35 Va ve Showing the Various elements assembled valve spring retainer. This washer 29 is carried therewith and illustrating the construction Of the within the gasket seat cup member 30 and it valve stem shield, and will be noted that the shield member securely F 3 is a detailed Sectional View taken supports this sealing structure. That portion 40 sta y On the line of F g. 1- of the shield member intermediate the groove 40 The present invention has been preferably il- 23 d fl 26 i outwardly tapered to lustrated with an engine of the overhead valve form t t taper of th valve spring t i type but it W b apparent that the principles and is substantially complementary thereto. 0f the invention may be lllVOlVBd in other types It will be noted t t t Shield Structure is of engmes as embodied in the assembly in such a way as to In i to g has be positioned inside of the valve spring and bisen mustiaa e ragmen Ion 0 en telescopically positioned with respect to the valve gine, partlcularly the engine cylinder head Ill stem and Valve guide y on Splash which n e ti nal coolin ackets provlded Wlth the co v n 0 g J might have a tendency to accumulate on the 50 H and which are arranged for supporting the intake and exhaust valves of the engine which Valve Stem and Which may be splashed up from the oil pocket 3! or squeezed out from between in this case are valves which open downwardly or toward the cylinder block. The cylinder head the coils f h sp 20 s thus t v ly pr structure is provided with an intake port I2 and vented from getting on the valve stem from 5 an exhaust port i3 which ports are controlled where it mayeventually leak into the intake passage I6 by creeping down the valve stem in said valve stem guide.

Although I have illustrated but one form of my invention and have described in detail but a single application thereof, it will be apparent to those skilled in the art to which my invention pertains that various modifications and changes may be made therein without departing from the spirit of my invention or from the scope of the appended claims.

What I claim as my invention is:

1. In a device of the character described, a valve including a stem portion, a valve guide for said stem portion, a valve spring, a valve spring retainer secured to the end of said valve stem portion, and a valve stem oil guard secured to said retainer by said valve spring and depending from said retainer, said guard constructed to shield the valve stem portion projecting from said uide.

2. In a device of the character described, a valve including a stem portion, a valve guide for said stem portion, a valve spring, a valve spring retainer secured to the end of said valve stem portion, and a substantially tubular valve stem oil guard having a flange portion clamped between said retainer and spring, the body portion or" said guard depending from said retainer and constructed to shield the valve stem portion projecting from said guide.

-3. In a device of the character described, a valve including a stem portion, a valve guide for said stem portion, a valve spring, a valve spring retainer secured to the end of said valve stem portion, and a substantially tubular valve stem oil guard having a flange portion clamped between said retainer and spring, the body portion of said guard depending from said retainer and moving together with said valve, said tubular guard body portion extending substantialy below the top of said guide intermediate the spring and guide and shielding the entire valve stem portion projecting from said guide.

4. In a device of the character described, a valve including a stem portion, a valve spring, a valve guide for said stem portion, a valve spring retainer secured to the end of said valve stem portion, a tubular valve stem guard having an outwardly extending flange seated against the underside of said retainer, and a valve spring seated against the flange of said guard and clamping same to said retainer, said tubular guard being thereby supported to depend from said retainer and providing a body portion arranged to shield the valve stem portion project- --ing from said guide.

5. In a device of the character described, a valve including a valve stem portion, a valve guide for said stem portion, a valve spring retainer secured to the end of said valve stem, a tubular valve stem oil guard depending from said retainer and shielding the valve stem portion projecting from said guide, and a sealing washer abutting said retainer, said tubular guard having an inwardly extending annular rib engaged with said washer to support same.

6. In a device of the character described, a valve including a valve stem portion, a valve guide for said stem portion, a valve spring retainer secured to the end of said valve stem, and having a valve spring seat and a tapered shank portion, and a tubular valve stem oil guard depending from said retainer flange and shielding the valve stem portion projecting from said guide, said tubular guard having a tapered portion substantially complementary to the tapered shank of said retainer.

'7. In a device of the character described, a valve including a valve stem portion, a valve guide for said valve stem portion, a valve spring acting on said valve, a valve spring retainer carried adjacent the end of said valve stem portion, and a valve stem oil guard of substantially tubular construction having a flange and a depending body portion, said flange clamped to the underside of said retainer by said valve spring, said body portion supported to lie intermediate the valve spring and said valve stem portion to shield the valve stem portion projecting from said guide, a sealing Washer, and means carried by the body portion of said guard and urged into spring contact with said sealing washer, whereby to retain the said washer in place against the underside of said retainer.

8.111 a device of the character described, a valve including a valve stem portion, a valve guide for said valve stem portion. a valve spring acting on said valve, a valve spring retainer carried adjacent the end of said valve stem portion, and a valve stem oil guard of substantially tubular construction having a flange and a depending body portion, said flange clamped to the underside of said retainer by said valve spring, said body portion supported to lie intermediate the valve spring and said valve stem portion to shield the valve stem portion projecting from said guide, a sealing washer, said body portion of said guard having an inwardly extending annular rib engaging said Washer to retain said washer in place.

ENOS R. JACOBY. 

